小学英语句型转换之肯定句变否定句名师优质课获奖市赛课一等奖课件.ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,本幻灯片资料仅供参考，不能作为科学依据，如有不当之处，请参考专业资料。,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,本幻灯片资料仅供参考，不能作为科学依据，如有不当之处，请参考专业资料。,小学英语句型转换,必定句变否定句,第1页,一、概念：,什么是必定句和否定句？,必定形式必定句,否定形式否定句,陈说句,陈说句：说明一件事情、一个想法，提出一个观点或表示自己心情句子。特点是：句末都是句号，用降调读！,第2页,必定句变否定句方法,1.,含,“be,动词和情态动词,”,型,，直接在,be,动词或情态动词后加,not,其它,照抄不变,。,be,动词包含：,am,is,are,was,were.,常见情态动词有：,can,could,would,will,may,等等。,例句：,I am a student.,I,am not,a student.,He is a boy.,He,is not/isnt,a boy.,I can speak English.,I,can not/cant,speak English.,第3页,必定句变否定句方法,注意缩写：,is not=,isnt,are not=,arent,was not=,wasnt,were not=,werent,am not,没有缩写，不过,I am=,Im,can not=,cant,would not=,wouldnt,could not=,couldnt,will not=,wont,第4页,必定句变否定句方法,2.,含,“,实意动词,”,型,，转换否定句时，记住五个字,“,一加一还原,”,标准。,“,一加,”,即在实意动词前加助动词否定,dont,doesnt,或,didnt,。,“,一还原,”,即把句中实意动词变回原形。,注意：在,普通现在时,中，当主语是第一、二人称或复数时，加,dont,来否定；当主语是第三人称或单数时，加,doesnt,来否定；,在,普通过去时,中，一律用,didnt,来否定。,例句：,I like apples.,I,dont,like,apples.,He likes apples.,He,doesnt like,apples.,She worked last night.,She,didnt,work,last night.,第5页,必定句变否定句方法,要注意特殊情况,：,碰到,some,变,any,;,碰到,too/also,变,either,;,碰到,and,变,or,;,碰到,always,变,never,。,例句,:1.There are,some,boys in the classroom.,There,arent,any,boys in the classroom.,2.The girl can sing,and,dance.,The girl,cant,sing,or,dance.,第6页,相关练习：,1.Mike would like some chicken.,Mike_like _ chicken.,2.,Heoftengoestobedatten.,He often _ _ to bed at ten.,3.Mary is a teacher,too.,Mary _ a teacher,_.,4.They went to Shanghai yesterday.,They _ _to Shanghai yesterday.,wouldnt,any,doesnt,isnt,either,didnt,go,go,肯,定句,变否定句,第7页,Thank you,第8页,